An AI that reads the prospect's website before writing to them
Connect your own Claude or ChatGPT key. It drafts your campaigns, writes to each contact from what Sestaro measured on their site, and sorts the replies as they come in.
A whole campaign described in one sentence
In "New campaign", pick "Describe it in one sentence" and give the target, the offer and the tone. Your AI writes the first message and the follow-ups from your offer profile, with a different angle for each follow-up.
The campaign stays a draft. You read it, correct it, and launch it on the day you choose.
Three ways to write a step
- Template: your text, sent as it is.
- Hybrid: your text, with one or two sentences written for each contact.
- AI: subject and body written for each contact from your goal.
Style and variants
Three email styles. "With headings" splits the message into short parts under real HTML headings and puts in bold the figure your goal wants to stand out.
An A/B test compares up to three goals on the same step, split evenly between contacts.
Every email starts from facts measured on the recipient's website
For a step based on the audit, Sestaro first reads the contact's homepage: platform and version, display time and Google PageSpeed scores. The AI receives only these dated facts and the fields of the record.
A well-built site is described as such, with the figures. When everything is technically sound, the message turns to growth (SEO content, Google Ads, lead generation), depending on what you sell.
An anti-bot wall blocks our robot, not Google's. In that case PageSpeed takes over, and only its findings are used.
Messages you read before they are sent
Messages are written as soon as a contact joins the campaign, including when your list fills up over time. The Drafts tab sorts them (awaiting approval, approved, failed, to rewrite) and gives each one a quality verdict and a spam score.
You edit, approve, reject or regenerate, one message at a time or in bulk. A long writing run works in the background: close the page, an email tells you when it is done.
The offer profile drafted from your website
The AI prepares your offer profile by reading your site: seven fields you correct at will. It goes with every message as what you say about yourself, and the AI never uses it to describe the recipient.
The AI context adds what the site does not say, up to 8,000 characters for the account, plus a text of its own for a campaign when the angle changes. From the profile, "Find these prospects" runs the search on the target it describes.
The same email in two languages
Name the languages in the goal, for example "in English then in Thai", and each email is written in that order, the same message twice.
Without an instruction, the AI writes in the recipient's language, taken from their record, their country or city, then from the language of their site found by the audit.
Your AI labels the replies and drafts an answer to each
The inbox gathers the replies received on your sending addresses, and your AI puts a label on each.
On a reply, it suggests a draft you edit before sending. Auto-reply is set campaign by campaign; it is off by default and waits for your approval when approval is on.
The Assistant acts from the page you are on
The Assistant button is on every page and answers in its language. Without a key, it shows you the closest FAQ questions; with yours, it writes an answer from the FAQ and from Sestaro's own code.
With your key, it acts. "Find construction companies in Paris with fewer than twenty people" opens the search already filtered. It also reads your campaigns, your lists, your replies and the deliverability of your domains.
Creating a list or unlocking a contact is only ever offered as a proposal, with a Run button that you alone press.
Filters set from your description
Describe your target and the AI sets the filters on the screen: role, industry, country, size, exclusions included. You see them and change them like any other.
CSV headers recognised by the AI
When a column has a header the tool does not recognise ("Firma", "Ansprechpartner"), the AI suggests the match, and you confirm it on screen.
Your account driven from Claude or ChatGPT
The Assistant's functions are also served by the API and by Sestaro's MCP server. A write or a spend there requires an explicit confirmation.
Your own key, and the model of your choice
Sestaro works with an Anthropic (Claude) or OpenAI (ChatGPT) key. It is stored encrypted and never shown again, and a button tests it with one call.
The model is chosen from your provider's list, read again every day, with its effort level. A new model is flagged, and so is a retired one, before a campaign fails on it.
Your provider bills you for its calls directly. Sestaro charges no sestaro for writing.
Writing rules built into the code
Every writer in Sestaro receives the same rules against the tics of generated text: stock phrases, repeated figures, long dashes. Prospecting emails also receive rules specific to cold email.
Each draft is checked before it is saved. If it quotes a figure no measure gives, a technology the audit did not see or a link you did not write, it is rewritten once with the reason, then marked as failed.
What the AI never does
- A campaign written by the AI stays a draft until you launch it, and approval of every message is on by default.
- A step based on the audit writes nothing when no fact was measured, and a figure no measure gives gets the draft refused.
- When a site is well built, the message says so instead of hunting for a flaw.
- WordPress, Shopify or PrestaShop are named only when the audit or the contact's record gives them, or when it is the platform you sell.
- The Assistant unlocks and creates nothing without your click. Through the API or MCP, a write or a spend requires an explicit confirmation.
- AI search makes up no contact, it turns your sentence into filters on the index.
Questions about the AI
Do I need an AI key to use Sestaro?
How much does the AI cost?
Can messages leave without me seeing them?
Which languages does the AI write in?
Describe your next campaign in one sentence
The account is free and needs no card. Add your key in AI and research keys, then describe your target.
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